Android bulk SMS software sends live text alerts to group of mobile phone users
Free
Aflik MonsterSMS the world's most secure inbox software for your secret messages
Skype offers voice chat, video chat, and instant messaging.
Aflik SMSTimer the world's most advance and fast inbox software for your schedul
Secure Instant LAN Messenger offers messaging, voice, video & sharing features.
Communicate with mobile and desktop users securely via self-hosted IM server